CN103833295B - Cement insulation board, for composition making it and preparation method thereof - Google Patents
Cement insulation board, for composition making it and preparation method thereof Download PDFInfo
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Abstract
The invention provides a kind of cement insulation board, for composition making it and preparation method thereof.For making the composition of cement insulation board, composition comprises following weight part: cement 59 ~ 74; Residue of aluminum-extracted pulverized fuel ash 25 ~ 40; Binding agent 2 ~ 8; Whipping agent 5 ~ 7; Suds-stabilizing agent 0.5 ~ 2; And water 40 ~ 60.The calcium hydroxide generation hydration reaction that in the residue of aluminum-extracted pulverized fuel ash of composition of the present invention, silicon oxide and aluminum oxide and hydrated cementitious discharge, forms hydraulic material; The binding agent of 2 ~ 8 weight parts is in order to improve the intensity of made cement insulation board simultaneously; Wherein suds-stabilizing agent and whipping agent can form a large amount of holes in cement insulation board, and the cement insulation board made with above-mentioned composition can reach the requirement of I type cement insulation board main performance index in Soviet Union JG/T041-2011 " composite foam concrete plate external thermal insulation system utilisation technology code ".
Description
Technical field
The present invention relates to building material field, in particular to a kind of cement insulation board, for composition making it and preparation method thereof.
Background technology
Flyash receives to catch the thin ash got off from the flue gas after coal combustion, is the primary solids refuse that coal-burning power plant discharges, if a large amount of flyash does not add process, will produces airborne dust, atmosphere pollution; River can be caused to silt up if enter water system, and toxic chemical substance wherein also can work the mischief to human body and biology.In recent years, it is found that the content of aluminium in the flyash of some areas is higher, can be used as new bauxite resource.From flyash, carry aluminium can make flyash turn waste into wealth, and has good Social benefit and economic benefit, but after carrying aluminium, remaining a large amount of residue is discarded still can cause secondary pollution.
Due to the requirement of building energy conservation environmental protection, need that materials for wall density is little, intensity be large, heat insulating, sound insulation, and foam cement can meet above-mentioned condition preferably.Foam cement is after foaming, and heat insulating and sound-proofing properties index improve greatly, and dry density can reach 300kg/m
3, in order to cement insulation board that cement, flyash, hydrophober, water reducer, exciting agent, anti-crack fiber, whipping agent etc. make for raw material on market.
In existing foam cement is produced, the intensity of foam cement always is a large problem, limits the application & development of foam cement.In order to improve intensity and the performance of inorganic materials, the available inorganic materials with more dominance energy replaces part material, to reach reinforced effects, Chinese patent CN103011732 describes the xonotlite enhanced foaming cement be mixed with by the xonotlite slurry of mass percent 10 ~ 20%, the foam cement of 80 ~ 90%, its ultimate compression strength brings up to 0.4MPa by original 0.3MPa, can improve the ultimate compression strength of 30%.
Summary of the invention
The present invention aims to provide a kind of cement insulation board, for composition making it and preparation method thereof, improves with the intensity of the cement insulation board of residue of aluminum-extracted pulverized fuel ash making.
To achieve these goals, according to an aspect of the present invention, provide a kind of composition for making cement insulation board, composition comprises following weight part: cement 59 ~ 74; Residue of aluminum-extracted pulverized fuel ash 25 ~ 40; Binding agent 2 ~ 8; Whipping agent 5 ~ 7; Suds-stabilizing agent 0.5 ~ 2; And water 40 ~ 60.
Further, in above-mentioned residue of aluminum-extracted pulverized fuel ash, chloride ion content is less than 1wt%.
Further, above-mentioned binding agent is water-soluble epoxy resin emulsion.
Further, above-mentioned cement is ordinary Portland cement; Whipping agent is the hydrogen peroxide solution of 30wt%; Suds-stabilizing agent is calcium stearate.
Further, above-mentioned composition also comprises: the water reducer of 0.4 ~ 0.7 weight part, the fortifying fibre of 0.3 ~ 1 weight part.
Further, above-mentioned water reducer is polycarboxylic acid water reducing agent; Preferred fortifying fibre is glass fibre.
According to a further aspect in the invention, provide a kind of cement insulation board, this foaming cement thermal insulation adopts above-mentioned composition to be that raw material is made.
According to another aspect of the invention, provide a kind of making method of cement insulation board, this making method comprises: step S1, and component each in above-mentioned composition is mixed to form mixed slurry; Step S2, is placed in mould by mixed slurry and foams, and form removal after placement 7 ~ 10h, obtains premolding warming plate; Step S3, by premolding warming plate room temperature maintenance 28 days, obtains cement insulation board.
Further, above-mentioned steps S1 comprises: step S11, by the residue of aluminum-extracted pulverized fuel ash in composition, cement, water reducer, suds-stabilizing agent mixing, forms the first mixture; Step S12, mixes the first mixture with the water in composition, binding agent, forms the second mixture; Step S13, mixes the second mixture with the whipping agent in composition, forms mixed slurry.
Further, above-mentioned steps S1 comprises: step S11 ', by the residue of aluminum-extracted pulverized fuel ash in composition, cement, water reducer, fortifying fibre, suds-stabilizing agent mixing, forms the first mixture; Step S12 ', mixes the first mixture with the water in composition, binding agent, forms the second mixture; Step S13 ', mixes the second mixture with the whipping agent in composition, forms mixed slurry.
Further, above-mentioned steps S1 also comprises the preprocessing process of residue of aluminum-extracted pulverized fuel ash, and preprocessing process comprises: carried out successively by pending residue of aluminum-extracted pulverized fuel ash washing, filtering, obtain filter cake; Filter cake is carried out drying, grinding successively, obtains the residue of aluminum-extracted pulverized fuel ash that chloride ion content is less than 1wt%.
Apply technical scheme of the present invention, mainly amorphous silica micro mist and a small amount of undrawn aluminum oxide in residue of aluminum-extracted pulverized fuel ash, making in the process of foaming cement thermal insulation as the composition components of cement insulation board using it, the calcium hydroxide generation hydration reaction that silicon oxide wherein and aluminum oxide and hydrated cementitious discharge, forms hydraulic material; In composition, with the addition of the binding agent of 2 ~ 8 weight parts in order to improve the intensity of made cement insulation board simultaneously, and the amount of binding agent is also unfavorable for the making of cement insulation board after exceeding above-mentioned scope, mobility too much can be caused to be deteriorated, to be unfavorable for foaming, also can to raise the cost; Deficiency can cause low strength; The wherein use of suds-stabilizing agent and whipping agent, can form a large amount of holes in formed cement insulation board, the cement insulation board made with above-mentioned composition can reach the requirement of I type cement insulation board main performance index in Soviet Union JG/T041-2011 " composite foam concrete plate external thermal insulation system utilisation technology code ".
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to embodiment, the present invention is further detailed explanation.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.The present invention is described in detail below in conjunction with embodiment.
In a kind of typical embodiment of the present invention, provide a kind of composition for making cement insulation board, said composition comprises following weight part: cement 59 ~ 74; Residue of aluminum-extracted pulverized fuel ash 25 ~ 40; Binding agent 2 ~ 8; Whipping agent 5 ~ 7; Suds-stabilizing agent 0.5 ~ 2; And water 40 ~ 60.
Described in background technology, mainly amorphous silica micro mist and a small amount of undrawn aluminum oxide in residue of aluminum-extracted pulverized fuel ash, making in the process of foaming cement thermal insulation as the composition components of cement insulation board using it, the calcium hydroxide generation hydration reaction that silicon oxide wherein and aluminum oxide and hydrated cementitious discharge, forms hydraulic material; In composition, with the addition of the binding agent of 2 ~ 8 weight parts in order to improve the intensity of made cement insulation board simultaneously, and the amount of binding agent is also unfavorable for the making of cement insulation board after exceeding above-mentioned scope, mobility too much can be caused to be deteriorated, to be unfavorable for foaming, also can to raise the cost; Deficiency can cause low strength; The wherein use of suds-stabilizing agent and whipping agent, can form a large amount of holes in formed cement insulation board, the cement insulation board made with above-mentioned composition can reach the requirement of I type cement insulation board main performance index in Soviet Union JG/T041-2011 " composite foam concrete plate external thermal insulation system utilisation technology code ".
Component using residue of aluminum-extracted pulverized fuel ash as the composition of making cement insulation board, reduce the raw materials cost of cement insulation board, for residue of aluminum-extracted pulverized fuel ash have found new application approach, avoid the environmental pollution and the wasting of resources of to be discarded by residue of aluminum-extracted pulverized fuel ash and causing.The binding agent adopted in the present composition and whipping agent adopt this area to make the conventional binding agent of cement insulation board and whipping agent.
At technique easily residual a small amount of chlorion in residue of aluminum-extracted pulverized fuel ash of flyash acidity extraction aluminum oxide, if the amount of chloride ions that remains too much, then the easy making to cement insulation board and performance have an impact, in order to avoid this impact as far as possible, preferably controlling chloride ion content in above-mentioned residue of aluminum-extracted pulverized fuel ash and being less than 1wt%.
As described above, binding agent of the present invention can be binding agent conventional in prior art, preferably there is the polymkeric substance of polymer mesh structure, preferably this binding agent is water-soluble epoxy resin emulsion further, this water-soluble epoxy resin emulsion better water-soluble, can with mixing of materials evenly.In addition, cement of the present invention and whipping agent all can adopt this area to make the conventional cement of cement insulation board and whipping agent, and the preferred above-mentioned cement of the present invention is ordinary Portland cement; Whipping agent is the hydrogen peroxide solution of 30wt%.Suds-stabilizing agent add mainly in order to improve the stability of bubble, extend time of bubble burst, preferred above-mentioned suds-stabilizing agent is calcium stearate.
In another preferred embodiment of the present invention, above-mentioned composition also comprises: the water reducer of 0.3 ~ 0.7 weight part, the fortifying fibre of 0.3 ~ 1 weight part.The use of above-mentioned water reducer can reduce the consumption of water to a certain extent, and the intensity of made cement insulation board is remained unchanged; The use of above-mentioned fortifying fibre can improve the intensity of made cement insulation board further.
Water reducer used in the present invention, fortifying fibre and suds-stabilizing agent all can adopt this area to make the conventional water reducer of cement insulation board and fortifying fibre, and the preferred above-mentioned water reducer of the present invention is polycarboxylic acid water reducing agent; Preferred above-mentioned fortifying fibre is glass fibre.
In the another kind of typical embodiment of the present invention, provide a kind of cement insulation board, foaming cement thermal insulation adopts above-mentioned composition to be that raw material is made.The foaming cement thermal insulation adopting above-mentioned composition to make has good strength property and heat-insulating property, and even some performance perameter can reach the requirement of I type cement insulation board main performance index in Soviet Union JG/T041-2011 " composite foam concrete plate external thermal insulation system utilisation technology code ".
In the another kind of typical embodiment of the present invention, provide a kind of making method of cement insulation board, this making method comprises: step S1, and component each in above-mentioned composition is mixed to form mixed slurry; Step S2, is placed in mould by mixed slurry and foams, and form removal after placement 7 ~ 10h, obtains premolding warming plate; And step S3, by premolding warming plate room temperature maintenance 28 days, obtain cement insulation board.Above-mentioned making method adopts composition of the present invention to be that raw material makes cement insulation board, and Making programme adopts this area to make the old process of cement insulation board; At standing precuring time controling at 7 ~ 10h, make slurry produce suitable intensity thus be beneficial to the demoulding, make the density of made cement insulation board, intensity and heat conductivility meet the service requirements of current cement insulation board.
The present invention in order to make binding agent, the effect of whipping agent gives full play to, preferred above-mentioned steps S1 comprises: step S11, by the residue of aluminum-extracted pulverized fuel ash in composition, cement, suds-stabilizing agent mixing, forms the first mixture; Step S12, mixes the first mixture with the water in composition, binding agent, forms the second mixture; Step S13, mixes the second mixture with the whipping agent in composition, forms mixed slurry.In said process, step S11 be in order to allow powder be mixed to get evenly, powder mix be conducive to product bubble diameter evenly and the raising of product strength, step S12 is to form uniform slurry, and the churning time of slurry can affect the final quality of product; Step S13 is to be mixed by hydrogen peroxide, because hydrogen peroxide reacts in the basic conditions generate oxygen rates comparatively fast, generally, step S13 completes in 5 ~ 10s.
At technique easily residual a small amount of chlorion in residue of aluminum-extracted pulverized fuel ash of flyash acidity extraction aluminum oxide, if the amount of chloride ions that remains too much, then the easy making to cement insulation board and performance have an impact, in order to avoid this impact as far as possible, preferred above-mentioned steps S1 also comprises the preprocessing process of residue of aluminum-extracted pulverized fuel ash, preprocessing process comprises: carried out successively by pending residue of aluminum-extracted pulverized fuel ash washing, filtering, obtain filter cake; Filter cake is carried out drying, grinding successively, obtains the residue of aluminum-extracted pulverized fuel ash that chloride ion content is less than 1wt%.
Below with reference to embodiment, further illustrate beneficial effect of the present invention.
In following examples and comparative example, the chloride ion content of residue of aluminum-extracted pulverized fuel ash is 0.44%.
Embodiment 1
Take each component by with the parts by weight in following table 1, amount to 10kg.Wherein binding agent adopts viscosity to be the aqueous epoxy resin emulsion of 800 ~ 1500.
By load weighted residue of aluminum-extracted pulverized fuel ash, cement, suds-stabilizing agent, water reducer and fortifying fibre, put into stirrer and with after the stirring velocity of 800r/min stirring 10min, form the first mixture; In above-mentioned stirrer, add water, binding agent, after stirring 4min, form the second mixture; Add whipping agent in the most backward stirrer, after stirring 5s, make mixed slurry.Poured in mould by mixed slurry and foam, form removal after placement 9h, namely room temperature maintenance to 28 day obtains the cement insulation board of embodiment 1.
Embodiment 2 takes each component by with the parts by weight in following table 1, amounts to 10kg.Wherein binding agent adopts viscosity to be the aqueous epoxy resin emulsion of 800-1500.
By load weighted residue of aluminum-extracted pulverized fuel ash, cement, suds-stabilizing agent, water reducer and fortifying fibre, put into stirrer and with after the stirring velocity of 800r/min stirring 10min, form the first mixture; In above-mentioned stirrer, add water, binding agent, after stirring 5min, form the second mixture; Add hydrogen peroxide whipping agent in the most backward stirrer, after stirring 6s, make mixed slurry.Poured in mould by mixed slurry and foam, form removal after placement 10h, namely room temperature maintenance to 28 day obtains the cement insulation board of embodiment 2.
Embodiment 3
Take each component by with the parts by weight in following table 1, amount to 10kg.Wherein binding agent adopts viscosity to be the aqueous epoxy resin emulsion of 800 ~ 1500.
By load weighted residue of aluminum-extracted pulverized fuel ash, cement, suds-stabilizing agent, water reducer and fortifying fibre, put into stirrer and with after the stirring velocity of 800r/min stirring 10min, form the first mixture; In above-mentioned stirrer, add water, binding agent, after stirring 7min, form the second mixture; Add whipping agent in the most backward stirrer, after stirring 6s, make mixed slurry.Poured in mould by mixed slurry and foam, form removal after placement 8h, namely room temperature maintenance to 28 day obtains the cement insulation board of embodiment 3.
Embodiment 4
Take each component by with the parts by weight in following table 1, amount to 10kg.Wherein binding agent adopts viscosity to be the aqueous epoxy resin emulsion of 800 ~ 1500.
By load weighted residue of aluminum-extracted pulverized fuel ash, cement, suds-stabilizing agent, water reducer and fortifying fibre, put into stirrer and with after the stirring velocity of 800r/min stirring 10min, form the first mixture; In above-mentioned stirrer, add water, binding agent, after stirring 8min, form the second mixture; Add whipping agent in the most backward stirrer, after stirring 10s, make mixed slurry.Poured in mould by mixed slurry and foam, form removal after placement 7h, namely room temperature maintenance to 28 day obtains the cement insulation board of embodiment 4.
Embodiment 5
Take each component by with the parts by weight in following table 1, amount to 10kg.Wherein binding agent adopts viscosity to be the aqueous epoxy resin emulsion of 800 ~ 1500.
By load weighted residue of aluminum-extracted pulverized fuel ash, cement, suds-stabilizing agent, water reducer and fortifying fibre, put into stirrer and with after the stirring velocity of 800r/min stirring 10min, form the first mixture; In above-mentioned stirrer, add water, binding agent, after stirring 7min, form the second mixture; Add whipping agent in the most backward stirrer, after stirring 8s, make mixed slurry.Poured in mould by mixed slurry and foam, form removal after placement 10h, namely room temperature maintenance to 28 day obtains the cement insulation board of embodiment 5.
Comparative example 1
Take each component by with the parts by weight in following table 1, amount to 10kg.By residual for load weighted aluminum-extracted pulverized fuel ash, cement, suds-stabilizing agent, water reducer and fortifying fibre, put into stirrer and with after the stirring velocity of 800r/min stirring 10min, form the first mixture; In above-mentioned stirrer, add water, after stirring 8min, form the second mixture; Add whipping agent in the most backward stirrer, after stirring 10s, make mixed slurry.Poured in mould by mixed slurry and foam, form removal after placement 7h, namely room temperature maintenance to 28 day obtains the cement insulation board of comparative example 1.
To the density of the cement insulation board of embodiment 1 to 5 and comparative example 1, thermal conductivity, ultimate compression strength, water-intake rate and flame retardant rating are tested, the test method wherein adopting GB/T5486 to specify detects the dry density of cement insulation board, the test method adopting GB/T10294 to specify detects the thermal conductivity of cement insulation board, the test method adopting GB/T5486 to specify detects the ultimate compression strength of cement insulation board, the method specified in the appendix A about " composite foam concrete plate external thermal insulation system utilisation technology code " in the recommendatory technical regulation of Jiangsu Province's engineering construction (Soviet Union JG/T041-2011) is adopted to detect the water-intake rate of cement insulation board, the test method adopting GB8624-1997 to specify detects the flame retardant rating of cement insulation board, and test result is in table 2.
Table 1
Table 2
| Density/(kg/m 3) | Thermal conductivity/(w/ (m 2.k)) | Ultimate compression strength/MPa | Water-intake rate/% | Flame retardant rating | |
| Embodiment 1 | 240 | 0.063 | 0.79 | 5.3 | A |
| Embodiment 2 | 250 | 0.066 | 0.84 | 5.4 | A |
| Embodiment 3 | 207 | 0.069 | 1.20 | 5.6 | A |
| Embodiment 4 | 189 | 0.069 | 0.88 | 6.9 | A |
| Embodiment 5 | 267 | 0.062 | 0.96 | 5.4 | A |
| Comparative example 1 | 256 | 0.77 | 0.61 | 9.7 | A |
| I type index | ≤300 | ≤0.08 | ≥0.50 | ≤10.0 | -- |
Found out by table 2, the performance perameter of embodiment 1 to 5 is all obviously better than the performance perameter of comparative example 1, and ultimate compression strength relative contrast example 1 has obvious lifting, meet the requirement of I type cement insulation board main performance index in Soviet Union JG/T041-2011 " composite foam concrete plate external thermal insulation system utilisation technology code ".
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. for making a composition for cement insulation board, it is characterized in that, described composition comprises following weight part:
2. composition according to claim 1, is characterized in that, in described residue of aluminum-extracted pulverized fuel ash, chloride ion content is less than 1wt%.
3. composition according to claim 1, is characterized in that, described binding agent is water-soluble epoxy resin emulsion.
4. composition according to claim 1, is characterized in that, described cement is ordinary Portland cement; Described whipping agent is the hydrogen peroxide solution of 30wt%; Described suds-stabilizing agent is calcium stearate.
5. composition according to claim 1, is characterized in that, described composition also comprises: the water reducer of 0.4 ~ 0.7 weight part, the fortifying fibre of 0.3 ~ 1 weight part.
6. composition according to claim 5, is characterized in that, described water reducer is polycarboxylic acid water reducing agent.
7. composition according to claim 5, is characterized in that, described fortifying fibre is glass fibre.
8. a cement insulation board, is characterized in that, described foaming cement thermal insulation adopts the composition according to any one of claim 1 to 7 to be that raw material is made.
9. a making method for cement insulation board, is characterized in that, described making method comprises:
Step S1, is mixed to form mixed slurry by component each in the composition according to any one of claim 1 to 7;
Step S2, is placed in mould by described mixed slurry and foams, and form removal after placement 7 ~ 10h, obtains premolding warming plate;
Step S3, by described premolding warming plate room temperature maintenance 28 days, obtains described cement insulation board.
10. making method according to claim 9, is characterized in that, described step S1 comprises:
Step S11, by the residue of aluminum-extracted pulverized fuel ash in described composition, cement, water reducer, suds-stabilizing agent mixing, forms the first mixture;
Step S12, mixes described first mixture with the water in described composition, binding agent, forms the second mixture;
Step S13, mixes described second mixture with the whipping agent in described composition, forms described mixed slurry.
11. making methods according to claim 9, is characterized in that, described step S1 comprises:
Step S11 ', by the residue of aluminum-extracted pulverized fuel ash in described composition, cement, water reducer, fortifying fibre, suds-stabilizing agent mixing, forms the first mixture;
Step S12 ', mixes described first mixture with the water in described composition, binding agent, forms the second mixture;
Step S13 ', mixes described second mixture with the whipping agent in described composition, forms described mixed slurry.
12. making methods according to claim 9, it is characterized in that, described step S1 also comprises the preprocessing process of described residue of aluminum-extracted pulverized fuel ash, described preprocessing process comprises:
Pending residue of aluminum-extracted pulverized fuel ash is carried out successively wash, filter, obtain filter cake;
Described filter cake is carried out drying, grinding successively, obtains the described residue of aluminum-extracted pulverized fuel ash that chloride ion content is less than 1wt%.
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| CN105565761B (en) * | 2015-12-11 | 2017-08-29 | 河南城建学院 | Light thermal insulation board and its processing method prepared by residue of aluminum-extracted pulverized fuel ash |
| TWI730270B (en) * | 2018-12-07 | 2021-06-11 | 國立高雄科技大學 | Foamed floating structure material and manufacturing method thereof |
| CN109534770A (en) * | 2018-12-19 | 2019-03-29 | 苏州交通工程集团有限公司 | A kind of foam concrete and preparation method thereof |
| CN115594468B (en) * | 2022-12-09 | 2023-03-07 | 河北化工医药职业技术学院 | Environment-friendly fireproof insulation board and preparation method thereof |
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| CN101993084A (en) * | 2010-11-29 | 2011-03-30 | 中煤平朔煤业有限责任公司 | Method for preparing silicon dioxide and aluminum oxide from coal ash |
| CN102603245A (en) * | 2012-03-08 | 2012-07-25 | 上海天补建筑科技有限公司 | Composite foaming cement heat-insulation plate material |
| CN102815960A (en) * | 2012-08-09 | 2012-12-12 | 江苏尼高科技有限公司 | Composite foamed cement heat retaining panel using high-volume fly ash and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101993084A (en) * | 2010-11-29 | 2011-03-30 | 中煤平朔煤业有限责任公司 | Method for preparing silicon dioxide and aluminum oxide from coal ash |
| CN102603245A (en) * | 2012-03-08 | 2012-07-25 | 上海天补建筑科技有限公司 | Composite foaming cement heat-insulation plate material |
| CN102815960A (en) * | 2012-08-09 | 2012-12-12 | 江苏尼高科技有限公司 | Composite foamed cement heat retaining panel using high-volume fly ash and preparation method thereof |
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